Lower back pain (LBP) recently became a severe and common problem for most office workers. The majority of people, including office workers and students with poor sitting postures whilst working, are experiencing lower back pain, which causes difficulty in daily moving and other inconveniences. There are many treatments dealing with lower back pain, but most treatments includes ergonomic equipment, so physiotherapy can only offer light relief, rather than solving the problem at the source. The aim of this project is to develop a novel way to designing a dynamic siting posture recognition and correction system. This system can identify people's sitting posture and provide its real time information to patients, letting them realise what posture they are acting now, aiming to re-build the awareness of their muscle and spatial position.